The invention discloses a lock sleeve cover cap riveting device and a riveting method thereof. The lock sleeve cover cap riveting device comprises a cover cap feeding device, a cover cap special product detecting and special product discharging device, an on-line cover cap detecting device, a lock sleeve feeding device, a lock sleeve special product detecting and special product discharging device, a riveting and pressing device, a riveting and pressing detecting device and a finished product classifying collecting device. The lock sleeve cover cap riveting method comprises the cover cap feeding step, the cover cap special product detecting and special product discharging step, the on-line cover cap detecting step, the lock sleeve feeding step, the lock sleeve special product detecting and special product discharging step, the riveting and pressing step, the riveting and pressing step and the finished product classifying collecting step. According to the lock sleeve cover cap riveting device and the riveting method thereof, rotary table mode running is adopted, cover cap feeding, cover cap special product detecting and special product discharging, on-line cover cap detecting, lock sleeve feeding, lock sleeve special product detecting and special product discharging, riveting and pressing, riveting and pressing detecting and finished product taking are finished in a full-automatic mode, full-automatic operation is achieved, the production efficiency is improved, and the manual operation is simplified.